Results 71 to 80 of about 1,035 (121)

Unsupervised classification of eclipsing binary light curves through k-medoids clustering. [PDF]

J Appl Stat, 2020
Modak S, Chattopadhyay T, Chattopadhyay AK.   +2 more
europepmc   +1 more source

Using R-based VOStat as a Low-Resolution Spectrum Analysis Tool [PDF]

We describe here an online software suite VOStat written mainly for the Virtual Observatory, a novel structure in which astronomers share terabyte scale data. Written mostly in the public-domain statistical computing language and environment R, it can do
Ashish Mahabal, Jogesh G. Babu
core   +1 more source

Computational AstroStatistics: Fast Algorithms and Efficient Statistics for Density Estimation in Large Astronomical Datasets

, 2000
We present initial results on the use of Mixture Models for density estimation in large astronomical databases. We provide herein both the theoretical and experimental background for using a mixture model of Gaussians based on the Expectation Maximization (EM) Algorithm.
Nichol, R. C., Connolly, A. J., Moore, A. W., Schneider, J., Genovese, C., Wasserman, L.   +5 more
openaire   +2 more sources

Exploring Magnetic Fields in Molecular Clouds through Denoising Diffusion Probabilistic Models

The Astrophysical Journal
Accurately measuring magnetic field strength in the interstellar medium, including giant molecular clouds, remains a significant challenge. We present a machine learning approach using denoising diffusion probabilistic models (DDPMs) to estimate magnetic
Duo Xu, Jenna Karcheski, Chi-Yan Law, Ye Zhu, Chia-Jung Hsu, Jonathan C. Tan   +5 more
doaj   +1 more source

Galaxies in haystacks: astrostatistics and the Gaia mission

, 2023
Talk given at the 2023 Joint Statistical Meetings " True North Strong and…Amazing at Astrostatistics! " invited paper session. Current file is a placeholder so I could generate a QR code. Will update.
openaire   +1 more source

Rare Event Classification with Weighted Logistic Regression for Identifying Repeating Fast Radio Bursts

The Astrophysical Journal
An important task in the study of fast radio bursts (FRBs) remains the automatic classification of repeating and nonrepeating sources based on their morphological properties. We propose a statistical model that considers a modified logistic regression to
Antonio Herrera-Martin, Radu V. Craiu, Gwendolyn M. Eadie, David C. Stenning, Derek Bingham, B. M. Gaensler, Ziggy Pleunis, Paul Scholz, Ryan Mckinven, Bikash Kharel, Kiyoshi W. Masui   +10 more
doaj   +1 more source

paired: A Statistical Framework for Detecting Stellar Binarity with Gaia RVs. I. Sensitivity to Unresolved Binaries

The Astrophysical Journal
Data Release 3 (DR3) from the Gaia Mission includes radial velocity measurements of over 33 million targets. Among many scientific applications, the overlap of this stellar sample with targeted exoplanet transit survey stars presents an opportunity to ...
Quadry Chance, Daniel Foreman-Mackey, Sarah Ballard, Andrew R. Casey, Trevor J. David, Adrian M. Price-Whelan   +5 more
doaj   +1 more source

The First Direct Occurrence Rate Estimates for Kepler Exoplanets in Small-separation Binary Star Systems: Planet Occurrence Is Suppressed in Binary Stars

The Astronomical Journal
Exoplanet occurrence rates facilitate comparisons between observations of planets and theoretical models of planet formation. Despite their deductive power, exoplanet occurrence rates for half the stars in the sky are missing because occurrence rate ...
Kendall Sullivan, Anne Dattilo, Natalie M. Batalha   +2 more
doaj   +1 more source

Six Maxims of Statistical Acumen for Astronomical Data Analysis

The Astrophysical Journal Supplement Series
The acquisition of complex astronomical data is accelerating, especially with newer telescopes producing ever more large-scale surveys. The increased quantity, complexity, and variety of astronomical data demand a parallel increase in skill and ...
Hyungsuk Tak, Yang Chen, Vinay L. Kashyap, Kaisey S. Mandel, Xiao-Li Meng, Aneta Siemiginowska, David A. van Dyk   +6 more
doaj   +1 more source

Glitches and Glitching Clusters in Rotation-powered Pulsars

The Astrophysical Journal
The study of pulsar glitch phenomena serves as a valuable probe into the dynamic properties of matter under extreme high-density conditions, offering insights into the physics within neutron stars.
Pei-Xin Zhu, Xiao-Ping Zheng
doaj   +1 more source